Lee Roo-ri (Choi Soo-young) tries to get a job at big company, but she gives up. She doesn't have a good relationship with her strict father. Lee Roo-ri decides to travel to Guam to get away. There, she meets Jung Tae-yang (On Joo-wan) who goes by the YOLO motto. He wanders around the world and places priority on his happiness, but he also carries an emotional wound.
After she meets Jung Tae-yang, Lee Roo-ri experiences a turning point in her life.
Cast
Main
Choi Soo-young as Lee Roo-ri[2]- the jobless daughter of Lee Shin-mo and Hong Young-hye. she went through a rough childhood because of Shin-mo, and later accepts a job offer to a food company
Choi Yoo-ri as young Lee Roo-ri
On Joo-wan as Jung Tae-yang[3][unreliable source?]- the biological son of Kevin Miller, he's a smart but easily annoyed man. throughout the series, he finds more and more about his backstory
Seo Hyo-rim as Ha Yeon-joo- the spoiled daughter of Yoon-Choon ok, who later gets into an on off relationship with Lee So-won
Park Jin-woo as Lee So-won- Roo-ri's brother and Lee Shin-mo and Hong Young-hye's son. He was pampered by Shin-mo as a kid, and works as a doctor. He later gets into an on off relationship with Ha Yeon-joo
Kim Kap-soo as Lee Shin-mo- the rich father of Roo-ri and So-won. he's a gruff, self centered, abusive man who pampers So-won and disregards Roo-ri as a waste. however, later throughout the series, he grows to become kinder and kinder, revealing that he had always cared for Roo-ri
Kim Mi-sook as Hong Young-hye- the abused and worked out wife of Shin-mo. Shes constantly burned out due to Shin-mo, and later moves out and works at a mattress store
Kim Soo-mi as Yang Choon-ok- the rich mother of Ha Yeon-joo. she constantly feels guilt of leaving her little brother at a train station while trying to escape their abusive mother
Tae-yang's household
Lee Il-hwa as Jung Hwa-young- Taeyang's biological mother
Shim Hyung-tak as Go Jung-do- Taeyang's step-father who works at a bakery
Song Kang as Kim Woo-joo- Taeyang's step brother. he's constantly caring for Eun-byul
Kim Ji-young as Go Eun-byul- Taeyang's step sister and Woo-joo's sister.
Lee Jae-ryong as Kevin Miller- Taeyang's biological father and Choon-ok's brother. he went to the US after being left behind by Choon-ok at a train station, but later becomes the head of a foods company.
^ abIn order to circumvent Korean laws that prevent commercial breaks in the middle of an episode, two 75-minute episodes are being shown each night with a commercial break between the two.
^Shown back-to-back on October 21, due to the airing of a special movie One Step on October 22.
^No episodes were aired on October 28 and 29 due to the on-going labor strike at MBC. In return, MBC aired a special movie Train to Busan on October 29.
^Timeslot changed to Sundays at 20:45 from this point onward, with two episodes shown back-to-back each night.
